Athens or Istanbul in May?
In May, Athens and Istanbul are overall neck and neck — it comes down to your priorities.
AthensPhoto: Jebulon · CC0
IstanbulPhoto: Bosphorus_Istanbul_2007.jpg: Gryffindor derivative work: Stegop · Public domainKey figures in May
| Criterion | Athens | Istanbul |
|---|---|---|
| Average daily high | 25 °C | 21 °C |
| Average daily low | 15 °C | 14 °C |
| Sea | 19 °C | n/a |
| Rainy days | 5 rainy days (est.) ★ | 7 rainy days (est.) |
| Sun | 8 h/day | 8 h/day |
| Humidity | 62 % | 74 % |
Winner by travel type
Trade-offs
- Athens is about 4 °C warmer by day.
- Athens is drier, with about 2 fewer rainy days.
Athens or Istanbul in May: the short answer
In May, Athens and Istanbul are essentially level on the overall climate score (both around 86/100). The decision comes down to the individual criteria below.
This comparison focuses on May as a representative month for the pair; for any other month, use each destination's month-by-month pages. Across the whole year Athens averages a climate score of 68/100, Istanbul 66/100. Both profiles below are historical monthly averages, not a forecast.
Weather in May, side by side
The average daily high is about 25 °C in Athens and 21 °C in Istanbul — warmer in Athens. Average daily lows are around 15 °C versus 14 °C.
On rain, Athens sees about 5 rainy days in May and Istanbul about 7 — drier in Athens. Sunshine is comparable (8 vs 8 hours a day).
Rain and sun across the year
Over a full year Athens records roughly 73 rainy days and Istanbul about 100 — the drier of the two overall is Athens. At their sunniest, Athens reaches about 9 hours of sun a day (July) and Istanbul about 9 (July). If dependable dry, sunny weather is your top priority, weigh these annual totals alongside the single month above.
Best time to visit each
Climatically, Athens is at its best in May, June, September and October, while Istanbul peaks in May, June, July and September. If your dates are fixed, pick the destination whose strong season overlaps them; if you are flexible, plan around these windows.
Which suits which kind of trip
Based on the May scores for each travel style:
City breaks: both are close (Athens 96 vs Istanbul 96).
Active & hiking: Istanbul scores higher in May (Athens 87 vs Istanbul 91).
Family: Athens scores higher in May (Athens 85 vs Istanbul 74).
Verdict: which should you pick?
There is no single winner — it depends on your month and your priority. For May specifically, use the head-to-head above; over the year, Athens carries the slightly higher overall climate score. Choose Athens if its strong months and profile match your plan, Istanbul if its do. The month-by-month pages for each destination give you the full picture before you book.